Grate



NOV. 22, 1932. w HEGELER ET AL 1,888,348 I GRATE Filed April 8, 1930 2 Sheets-Sheet 1 INVENTORS WWW ATTORNEY. I

Now 22, 1932. J. w. HEGELER ET AL 1,388,348

GRATE Filed April 8, 1950' 2 Sheets-Shegt 2 azflft6an5yac/f ATTORNEY.

Patented Nov. 22, 1932 warns W. -rne nnnnnnn net EncA vnnncnor n nvIt n, ttrnorsassrqnonsmo THE Hessian ZINC ooiv rang' on; nany ttn, ILnIno s, IA com trron or.

ILLINOIS snare This invention relates to grate s and-re; late s particularly; to grates for ore sinterlng V H I rectlon ndicated by the arrows.

machines.

etedl l m biefit f the nventio ew prq e a lmp e ls e wh h. il be simple 1n construction, strong, durable,

relatively, inexpensiye to nanufacture and effective in operation.

'Afurther obj ec't of the invention to pro; I

vide a j g'i'ate for the purpose specified, in

which the pa rtsiof the grate Whichare partitnila'r'lyv subject to Weill and failure, may quickly and oony eniently be removed and re placed thus renewing andrestoring thegrate and extending the life thereof almost indelinit'ely, andalso obviating the necessity of scrapping the entire grate in case of break age, as is the case at present W1th grates consis'ting'of a' single integral'piece, of which thereare many new in cornnionpuse.

Still a further" obgect of the invent on is to provide a grate, the supportlng surface of which is formed by a multiplicity of memg. berssupported so'as to be capableot and to which relative movement orplay will be imparted, in operation,"sufiicient to prevent fragments of ore from lodging 'in'the air passages ofthe grate, thereby clogging 'the. saine and preventing, or seriously impa ring designed operation ofthe grate.

Specifically,afurther object of the inven-; tion is to provide a grate ernbodying our 1n-/ VelllllC-Il and improvements, WillClllS part cularlydesigned and especially adapted for use in ore sintering machines.

To effect the objects thereof, a grate embodyin'g' our invention and improvements" comprises the various features, combinations of features and details of Construction here inafter described and'claiined.

In the accompanying drawings, in which our in'ventionis fully illustrated,

1 is a detache d top planyiem partly broken away to disclose underlying parts,

showi'i'i'g' a grate embodying our invention as.

einb'odied in a palletandgra te mechanism for an oresinter'ing furnace.

Fig. 2 is a sectional View thereot on the line 22 of Fig. 1. i I

Fig. 3 is an enlarged fragmentary View.

ig-ov 4 is an enla ged st n li de. isas: on the'fline L- 4: of Fig.1 looking inthe dig,

Fig. 5 .is an enlarged fragrnentary side;;,

view substantially. onthe, line 55 ofiFig l. .55, v

v positelend of a detached, section. V

F1g. 101 ,isa View substantially sim lar, toi e5r 4 Fig. '2,lillustrating a modified construction. I

Fig. .11 isfa sectional side yiewpn, the line,

11 11 of Fig. 10. Fig, 12 is a View substantially-similar to Fi 10, illustrating anotherlinpdification, Figs l3 and 14 are sirnilar,sectional side views, taken substantially, on the li1 1e. 1313f, ofFig. 12, showing thelock bariorthe-grate bars in different positions.

Fig. 15 is a Viewsubstantiallysirnilar to.{I5

Fig; 8, illustrating modified Ineans for spaoing the grate bars,

Fig. 16is a fragmentary, sectional view-on the, line 16-4601? .Figf15. i V i I Fig. 17 is a tragnlentaryfiopeplan yiew t -B0 one of the grate-sections, illustrating,rnodi iied means for spac ng the grate ba rsa Fig.18 1s a View substantially sirnilar to I: Fi 8 illustrating a forrn of loclg bar for the gratebars; and

Fig. 19'is a 'View substantially similar-,to Fig. 18, showingstill another modified form; ofloclibar i In the accompanying, drawings, ehaye,

improvementsasapplied in use in a grate and; pallet mechanism for ore sinterlng map; chines. Many I of the,featuresw of our, irn

proved grate, howeyer, are adapted for geni eral use in connection with ,difi'erent ,types. of traveling gratestructnres and we do not,

therefore, desire. to 1; liinit our'sely-e t th particular application or adaptation shown,

but desire to eiitendlthe protection of lthe lm patent to any grate structure which comes within thescope of the appended claims.

Describing the invention with particular reference to the drawings and referring particularly, in the first instance, to Figs. 1 to 9, inclusive, A designates, as a whole, a pallet for an ore sintering machine, and A designates as a whole, grate sections mounted on said pallet in accordance with our invention. The pallet A is of a usual type, comprising side walls a, a, which are rigidly connected by bars a which define holes or openings a in the bottom or bed portion of said pallet.

In use, the pallet A is movably supported upon wheels a mounted to rotate on fixed studs secured in the side walls of the pallet and which, in operation, run on tracks provided for the purpose, not shown. As re ards its usual features and excepting as may l iereinafter be particularly described and pointed out, the pallet A may be of any usual or approved construction and will readily be understood by persons familiar with the art from an examination of the drawings, witln out a further description thereof in detail.

In accordance with out invention, the grate sections, A consists of what, appropriately, may be designated grate locking bars '1 adapted to be secured to the side walls of the pallet, and which extend parallel with the pallet bars a and are positioned substantially centrally of the openings a defined by said bars.

In the preferable construction shown, the

lock bars 1 are confined in recesses 9 formed in the side walls a, a of the pallet and are secured in engagement with said recesses and thus to the pallet A, by means of angle plates designated as a whole, Z), see particularly Figs. 7 and 9, each of which comprises a top plate 3, the top surface of which, when said angle plate is installed for use, is disposed substantially in the plane of the grate and forms a part of the grate surface, being provided with slots or passage-ways 4: to permit the passage of air downwardly therethrough into the wind box of the machine, not shown.

Said angle plates 1) also comprise depending flanges 5, the lower ends of which are forked, as shown at 6, and are adapted to engage slots 7 formed in the lock bars 1, preferably adjacent-to both ends thereof.

As assembled for use, the angle plates 6 are'secured in position by means of pins 8 secured in the side walls of the pallet and which project inwardly therefrom and en gage recesses 9 formed in the upper surfaces of said plates.

In the preferable construction shown, also, the top plates 3 of the angle plate 7) are relatively thick at their centers, see Figs. 7 and 9, and are provided in their undersides with grooves 10 which form lateral extensions of the closed inner ends of the slots 6 in the depending flanges thereof, adapted to fit loosely over the tops of the lock bars 1, when positioned in the machine,,to prevent turning thereof.

In accordance with our invention, the grate sections A of the machine are formed by a plurality of separate grate bars 11, each of which comprises a web portion formed in e which is a hole or opening 12 which, in use, is ad usted over a lock bar 1.

openings 12in the grate bars lli are loosely fitted tothe lock bars 1, a, desirable relation for most purposes bein such that Said holes or openings are one-eighth of an inch larger than said lock bars. Obviously, however, re-

this relation may be varied as desired.

In what we now consider to be the preferable relation, also, see Figs. 6 and 8, the lock The grate bars 11 extend substantially at right angles to the lock bars 1 and are of such length that. their opposite ends will extend over the adja-:- cent pallet bars a between which they, aremounted. Also, in what we now consider the: preferable embodiment of the invention, the

bars 1, when assembled in the machine, will.

extend substantially tangent to the top sidesi;

which operates to prevent lodgement of ore and fuel fragments between the grate bars, which might seriously and effectiveness of the machine.

In like manner, the tops of the forked opens.

ings 6 in the depending flanges of the angle plates 1) areso positioned that the top sides of said openings will fit the ends of saidlock bars to which they are adjusted with onlv slight clearance, thus confining said loch bars in substantially fixed position on the pallet with provision for only very slight play. 7 7

In the preferable construction shown, also, the lateral sides of the top plates 3 of the angle bar I) extend over and are adapted to rest upon the pallet bars a between which they are positioned, respectively.

here, as shown, the top plates 3 of the angle plates 6 are thinner than the corre sponding dimension of the grate bars 11, contact of the ends thereof with the cor responding pallet bars a is effected by meansimpair the operation of downwardly extending lugs 18 formed on 735 the undersides of said angle position, see Figs. 7 and 9.

To provide suitable air passages in the plates in proper grate surface, our invention contemplates the use of means for spacing the grate bars apart when assembled for use. Simplemeans for this purpose consists o'f hub portion 14 formed on opposite sides thereof which wiltoperate, inan obvious manne'r, to maintain "said grate bars in spaced relation, providing air 'passage ways 2 between adj ac'entbars,

through which airand-othergasesmay pass si tlon and: theugrate;,-1s again n -condition, for

' downwardly through -tlre grate sections A width of the airspaces 15, "if desired,-to meet different operatmg conditions.

L into the windbox,notshown. "The hubs 1% are preferably," though *not necessarily, ta V pered. "Also, as the full equivalent of the hubs 14; our inventioncontemplates the use of" washers inserted over the'lock bars 1 between adjacent gratebars;the-thickness of said washers being" proportioned to provide air spaces of desired width in the grate surface.

' "An advantage of this constructionjisthat it providessimple means for varying the This modification is shown'in Figs. 15 and preferred form of the device shown inFigs.

1 to '9, and the' spacing washers are designated 16.

As a further modification, we contemplate 'spacingthe' grate bars 11-apart by means of lugs formed thereon, respectively, inposition to contact with a part'of the adjacent grate bar.

This modification iss'hown in Fig. 17 in which the reference numerals l and lldesig nate the lock bars'and the grate bars, respec- :1ftively, and the n'umeral' l? the spacing lugs.

; the holes "or openings 12 in the grate bars 11' In accordance with what we now consider the preferable-embodiment of the invention,

are cut away* at their undersides, as shown at 18,the width of=said openings being greater than the dimension of the lock bar 1 between the bottoms of the slots 7 therein, but less'than the full dimension of said loc-k bars.

over an end thereof before said lock bars are assembled in the machine or, after said lock' bars have been assembled in'the machine, saidgrate bars may be adjusted thereto by insert-' ing the ends of the openings 18*through the 1 slots 7 to effect register of the openings 12 in the grate bars with the lock bars 1 and then moving said grate bars endwise on the- 1 bar 1, this being continued until a contemplated number of grate bars have been adjusted to said lock bars. Obviously, where the grate bars are adjusted to the lock bars after said lock bars have been assembled in the machine, this can only be done before the* and the holesin the grate bars which engage angle plates 7) are secured in position.

In like manner, if a grate bar 11 should be end of themachine nearest the broken bar, removing athe'; grate bars from the; lock bar to and including the broken ban, and in then ta'chedangle: plate Z2 is again secured in poing the lock bars 1 on the'pallet-and, the grate bars 11 OllrthE :lock bars, we contemplate a construction in whichthe ends of the lockrbars are secured in holes formed direct- ;ly in the-side wallsaa, a of the pallet, thus dispensing entirely with the plates 5 as means *for securing the :lockbars to the pallet. This modification is shown in -Figs. 10 and 11 of thedrawings in which, as in the pre- "ferred 'formot the device a, a designate the side walls .of' thetpallet, 1' the lock bar which,

as shown, is circular in cross-section and the ends of which are secured ing holes formed directly in the sidewallsof the pallet.

As shown,- also, the holes 12 in the grate bars,- instead of being open at their undersides, are entirely closed, the grate bars being adjusted to the-lock ban either before said :lock bar is mounted in the machine orwith one w Obviously, however, the grate .bars may be 1 provided with openings in their. undersides and the lock bars provided with slots for per- 'mitting the grate barsto. be adjusted to the lock barsin the same manneras in Figs. 1 to :9,-1f deslred.

The. lock bars 1- maybe secured in designed engagement with the holes formed in the side "wallsof the palletto receive them by any suitable means, as. by cotter pins 19.

' I For-the :most'part, thesame reference characters are used for designating the parts in Figs. 10 and 11 as in Figs. 1 to 9,,inclusive.

As still a furthermodification of the preferred'embodiment of the invention shown in Figs. 1 to 9, we contemplate a construction as shown in Figs. 12 to 14, inclusive, in which the-ends of the lock bars .1 are mounted in holes formed directly in the side walls a, a of the pallet and are rotatable thereimthe sides of the portions ofthe lock bars which, when installed, are exposed between the side walls of the pallet, being flattened; asshown at 20,

the lock bars being cutaway-at their undersides-as in theform of the deviceshown in Figs. 1 to 9.

With this construction, it is obvious that the grate bars may quickly and conveniently be adjusted to the lock bars after said lock bars have been mounted in the machine by to the lock bar, turning it so that the flattened sides of said lock bar will be out of register with the open sides of the grate bars when their ends rest upon the pallet bars (L as shown in Fig. 14.

In said Figs. 12 to 14, the same or corresponding parts are designated by the same reference characters as in Figs. 1 to 9.

With the construction shown in Figs. 12 to '14, it is obvious that any broken grate bar may be quickly removed and replaced without disturbing any other grate bars by merely turning the lock bar on which the broken grate bar is secured, replacing it with a new rate bar and again turning the lock bar 1 to firing the flattened sides thereof out of register with the opening in the grate bar.

To provide for quickly and conveniently turning the lock bars 1 into position for adjusting the grate bars 11 thereto, shown in Fig. 13, and to lock said grate bars thereon, as shown in Fig. 14, cranks 21 are secured to projecting ends of the lock bars 1 and means are provided for securing said cranks in positions corresponding to locking positions of said lock bar by any suitable means securely connecting the outer ends of the cranks 21 to the adjacent side wall of the pallet.

Simple means for this purpose consists of lugs 22 formed on the outer side of the adjacent side wall of the pallet positioned in the path of movement ofthe cranks 21 and in such relation that contact of said cranks therewith will define full locking engagement of the lock bars 1 with the holes or openings in the rate bars. As installed for use, the cran s 21 are secured to the lugs 22. lVhile our invention contemplates any suitable means for this purpose, we prefer the means shown, consisting of bendable pins 23 inserted through aligned holes in said cranks and lugs and secured therein by bending the ends of said pins against the sides of said cranks and lugs.

As still a further modification of our invention, instead of lock bars of the crosssection shown in Figs. 1 to 17, and heretofore described, our invention contemplates equally the use of lock bars 1 which are either rec tangular in cross-section, as shown in Fig. 18, or which are T-shaped as shown in Fig. 19.

Also, the holes or openings 12 in the grate bars shown in Figs. 18 and 19, may either be closed, as shown in Fig. 18, or open-sided as shown in Fig. 19.

We claim:

1 1. In a pallet and grate mechanism for machines of the class specified, the combination of a pallet consisting of side walls, spaced bars which rigidly connect said side walls and which define openings in said pallet, grates supported on said pallet above each of the openings therein, each of which consists of a lock bar secured to opposite side walls of the pallet, and series of separate grate bars provided with holes loosely fitted to said lock bar, the ends of said grate bars extending over and resting upon adjacent pallet bars.

2. A pallet and grate mechanism as specifled in claim 10, in which as assembled for operation with the ends of the grate bars resting on the pallet bars, the centers of the lock bars are above the centers of the holes in the grate bars adjusted thereto, thereby providing for limited play of the grate bars relative to the pallet bars in operation.

3. A pallet and grate mechanism as specified in claim 1, in which the means for securing the lock bars to the side walls of the pallet consists of angle plates comprising depending flanges provided, respectively, with openings adjusted to said lock bars, and which also comprises means for securing said angle plates to the side walls of the pallet.

4. A pallet and grate mechanism as specified in claim 1, in which the means for securing the lock bars to the side walls of the pallet consists of angle plates comprising depending flanges provided, respectively, with openings adjusted to said lock bars, the side walls of the pallet being provided with recesses adapted to receive said lock bars, and which also comprises means for securing said angle plates to the side walls of the pallet.

5. A pallet and grate mechanism as specified in claim 1, in which the means for securing the lock bars to the side walls of the pallet consists of angle plates comprising depending flanges provided, respectively, with openings adjusted to said lock bars and the side walls of the pallet being provided with recesses adapted to receive said lock bars, and which also comprises pins secured in the side walls of the pallet which extend inwardly and interlock with rigid parts of said angle plates.

In witness that we claim the foregoing as our invention, we afllx our signatures this 5 day of April, 1930.

JULIUS lV. HEGELER. HAL E. ERCANBRACK.

CERTIFICATE OF CORRECTEON.

Patent No. 1,888,348. November 22, 1932.

JULIUS W. HEGELER ET AL.

It is hereby certified that error appears in the printed specification of the shore numbered patent requiring correction as follews: Page 4, line 80, claim 2, tor claim "10" read claim "l"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Gffice.

Signed and sealed this 24th day of January, A. l). 1933.

M. J Moore,

(Seal) Acting Commissioner of Patents. 

